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Commit 2886539d authored by Rafi Rubin's avatar Rafi Rubin Committed by Jiri Kosina
Browse files

HID: ntrig: fix touch events 



This reinstates the lost unpressing of BTN_TOUCH.  To prevent undesireably
touch toggles this also deals with tip switch events.

Added a trap to prevent going out of bounds for hidinputs with empty reports.

Clear bits of unused buttons which result in misidentification.

Signed-off-by: default avatarRafi Rubin <rafi@seas.upenn.edu>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent eff7f270

drivers/hid/hid-ntrig.c

+11 −0
Original line number Diff line number Diff line
@@ -140,6 +140,9 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field, 
			nd->reading_mt = 1;

			nd->first_contact_confidence = 0;

			break;

		case HID_DG_TIPSWITCH:

			/* Prevent emission of touch until validated */

			return 1;

		case HID_DG_CONFIDENCE:

			nd->confidence = value;

			break;
@@ -259,6 +262,7 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field, 
						BTN_TOOL_TRIPLETAP, 0);

				input_report_key(input,

						BTN_TOOL_QUADTAP, 0);

				input_report_key(input, BTN_TOUCH, 0);

			}

			break;
@@ -308,13 +312,20 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id) 




	list_for_each_entry(hidinput, &hdev->inputs, list) {

		if (hidinput->report->maxfield < 1)

			continue;



		input = hidinput->input;

		switch (hidinput->report->field[0]->application) {

		case HID_DG_PEN:

			input->name = "N-Trig Pen";

			break;

		case HID_DG_TOUCHSCREEN:

			/* These keys are redundant for fingers, clear them

			 * to prevent incorrect identification */

			__clear_bit(BTN_TOOL_PEN, input->keybit);

			__clear_bit(BTN_TOOL_FINGER, input->keybit);

			__clear_bit(BTN_0, input->keybit);

			/*

			 * A little something special to enable

			 * two and three finger taps.